Platylobium formosum is a species of flowering plant that belongs to the Fabaceae family. Commonly known as the common flat-pea or the swollen-joint plant, Platylobium formosum is a perennial shrub that is native to Australia. Its other synonyms include P. conostylis, P. parviflorum, and P. formosum var. conostylis. The leaves of this plant are grey-green in color and are pinnately compound with 10 to 16 leaflets. The flowers of Platylobium formosum are yellow and bloom in clusters of 2 to 6. This plant is commonly found in dry environments such as heathlands, heathy woodlands, and forest margins.